Oh this poor comic! I got about halfway though it before I realized I had it all backwards. What seems to work better is that FIRST you bleed your heart out onto a page (or whatever medium you're working in) and THEN you use your brain to clean everything up and make it legible.
Still I think the sentiment is right. It's not always like this. Sometimes making stuff is a joy from start to finish. But other times the worry creeps in.